Oil-tank construction.



JQ G. HITGHFIELD. .OIL TANK CONSTRUCTION.

APPLIQATION PIL-BD AUG'A. 1910.

Patented May 9, 1911.`

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` OIL TANK CONSTRUCTION.

APPLICATION FILED AUG. 4. 1910.

'Patented May 9, 1911.

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Arm/mers AUNITED srnrns rn'rnnr onion.

.Term-GORDON I-IITCHFIELD, or BERKELEY, CALIFORNIA.

OIL-TANK consrnucrIon.A

Specification of Letters Patent;I j

Patented May e, 1911.

Appnaaon mea August 4, 1910. serial no. 575,543.

To all whom it may concern:

Be it known that I, JOHN G. Hironrmnn, a citizen of the United States, and a resident of Berkeley, in the countyof Alameda and State of California, have invented a new and Improved Oil-Tank Construction, vof which the following is` a full, clear, and exact Vdescription.

Among the principal objects which the present invention has in view are: to'provide a structure for oil containing tanks of portable and other character adapted to hold oil in such a manner as to prevent leakage;

to provide a structure of tank compartments for ships in which it is desired to transport oil; to provide a backing for oil containing compartments when formed in ships to render the structure solid and to prevent puncture of the lining material for the said compartments; and to provide a lining for the said compartments so constructed and arranged as to allow for the vibration and working of the ship, and to reduce to a minimum the danger of fire. l

One embodiment of the present invention is disclosed in the structure illustrated -in the vaccompanying drawings, in which like characters of reference denote corresponding parts in all the views, and in which- Figure 1 is a longitudinal sectionv in plan of a ship having oil carrying tanks-constructed and arranged in accordance with the present invention; Fig. 2 is a vertical cross section of the ship shown in Fig. 1; Fig. 3 is a detail View, on an enlarged scale, showing the method of constructing and uniting the sheets of lead lining used by me; Fig. l

is a detail view, on'an enlarged scale and in section, illustrating the method of applying the lead lining to the sides of wooden built ships; and Fig. 5 is a longitudinal section of a stationary or portable oil containing tank constructed and arranged in accordance with the present invention.

When tanks are formed in ships, the ship is referably divided longitudinally by a pa tition 10. The partition 10A is extended .from stem to stern to divide the ship into equal laterally disposed compartments. Thel said laterally, disposed compartments are divided lengthwise by cross partitions 11, 11 and 12, 12. The partitions 12, 12 are arranged'to form at the bow of the ship a compartment 13-and at the stern a compartment 14 whichmay be built as an air tank, if so desired, to increase the buoyancy of the ship. The partitions 10, 11 and 12 are t .When the sheathing 16 is applied to the framework of the ship at the sides, it .is

nailed or otherwise secured directly to the ribs 17, 17 of the ship. Before installing the partitions 10, 11 and 12, the lower part of the hull ofthe ship is filled with a suitable cement, such as Port-land or other hydraulic cement, to form a ballast and. a. hard foundaltion Hoor 18. Over the foundation 18' is disposed and firmly secured aiiooring 19. The sheathing 16 and the flooring 19'are covered on the inner side of the compartments or tanks thusvformed by lead sheets or plates 20. The lead sheets or plates 20 are united by being lapped, the laps being of suflieient size to fold over the {iat-headed nails used in securing the lead lto the planking, the top, of the sheets orplates being nailed by fiat-headed nails 21,'21, in a similar manner.' The plates are provided with ridges or wrinkles 22, 22. The ridgesl 22,

22 are provided to permitthe sheets 20 to spread or expand without imposing upon the said sheets a tearing strain. By means of this construction the working or .vibration of a ship structure is accommodated by the lead lining.

In order to prevent the leakage of the oil within the wood struct-ure around the nails 21, 21 and between the lapped joints of the plates 20, 20, I secure the said lapped joints by means of magnesite cement and solder, using an electric soldering iron, blow pipe or other convenient tool for that purpose. Over the heads of the nails 21, 21, I

ylikewise place a fiat section or cap 23 of lead, the edges whereof I solder to the sheets or plates 20 about the said nails 21`;`thereby preventing the contact of the oil with the said nails. At the junction of four plates 20, ,20 I provide an enlarged lead cap 241 adapted to extend over the four nails adjacent to the corner-of the said four plates.

In the. drawingsI have 'accentuated the extension of the ridges 22, to call particular attention thereto." It will be understood that in practice the projection of the said ridges will be small. j

When the oil carrying compartments are provided in metal ships, I prefer to back the sheathing 16 with any form of cement, such.

as magncsite or other suitable cement, which nected by means of' tie rods 28, 9,8, the ends whereof are threaded to receive tightening nuts 29, 2t), the ,whole outside being coated with magnesite cement to protect the wood from the weather and to reduce to a minimum tite-,danger offti re.

Having"thusV described my invention, I elaim as new and desire to secure by Letters Patent:

l. .An oil tank construction, comprising a wooden tank-shaped structure, a lining therefor embodyinga'j'ihnality of metal .sheets or plates, said sheets or plates having ridges formed therein to providel an excess of material to permit extension of the said plates, and a covering for said sheets or plates formed oi? magnesitie cement.

2. An oil tank construction, comprising al wooden tai'ik-shaped structure, a lining therefor embodying` a plurality of metal sheets or plates, said sheets or plates having ridges forn'led therein to provide an excess of material to permit extension of said sheets .or plates, and said sheets or plates being `sheets or plates, said sheets or plates having ridges formed therein to provide an excess of material to permit extension of said sheets 0r. plates, and said sheets or plates being provided with a lapping extension, a plurality of flat headed nails driven through said lapped extensions, and Aa plurality of small metal covering caps superposed above said nails and soldered to the metal tank lining surrounding said nails, and a covering for said sheets or plates formed ot magnesite cement.

4. Anv oil tank construction, comprising a ballast tioor for ships, embodying a hydrauliceonerete filling disposed adjacent to the keel of the ship,- a plurality of vertical partitions extended from said floor within the hull of said ship to form tank-like compartments, a lining tor said compartments embodying aV plurality of metal sheets or plates, said sheets or plates being united by lapped soldered extensions, suitable fastening' devices for securing said plates to said partitions, and suitable caps superposed over said fastening devices and soldered to the lining sheets or plates adjacent thereto, and a covering for said sheets or plates composed of magnesite cement.

5. An oil tank rconstruction, comprising a ballast tlior for ships, embodying a hydraulic concrete filling disposed adjacent to the keel ot the ship, a )lurality of vertical partitions extended from said floor within the hull of said ship to 'form tanlelike compartn'ient's, a cement-like filling for said partitions, a lining for said emnpartments embodying a plurality ot metal sheets or plates,

said sheets or plates being united by lapped y soldered extensions, suitable fastening devices for securing Said plates to said partitions, suitable caps superposed over said fastening devices and soldered to the lining plates adjacent` thereto, and a covering for said sheets or plates composed of magnesite cement.

ln testimony whereof l. have signed my name to this spccitieation in the presence of vtwo subscribing Witnesses.

JOHN GORDON HITOHFlfELD.

j C. C. CUNIIA. 

